Carbon steel pipe standard

Carbon steel pipe is one of the widely used steel pipes due to its safety and durability. The Carbon steel pipe material and qualities are maintained through various standards. There are ASME standards which regulate the nominal sizes of the pipe. The NPS grading also governs the nominal sizes. For example ASME b15.5 covers nominal sizes of ½ inches through 24 inches. The NPS standards directly refer to the nominal size. For example, the NPS 4 standard means the pipe is 4 inches in internal diameter. There are also pressure classes that indicate how much pressure they can contain. The pressure classes vary from 150, 300, and 400 up to 2500 and above in some cases.

These pressure classes can also be denoted in lbs. for example a 3000lb pressure class indicates that the maximum pressure containment of the pipe is 3000 lbs. The standards also indicate the carbon content of the materials. There are high carbon content materials and low carbon content materials. The low carbon content materials is referred by an additional L with the grading such as A106L, and the high carbon content with an H such as A106H. The carbon steel could also be either cold drawn to be seamless or be welded through hot rolled conditions. The carbon steel seamless pipe is preferred in applications where smooth surface is preferred and welding is not. The ASTM A106 Gr B price is very cost effective. Therefore it is used in many applications such as boilers, power plants and oil and gas industries.

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